空中接收 的英文怎麼說

中文拼音 [kōngzhōngjiēshōu]
空中接收 英文
in-flight pickup
  • : 空Ⅰ形容詞(不包含什麼; 裏面沒有東西或沒有內容; 不切實際的) empty; hollow; void Ⅱ名詞1 (天空) s...
  • : Ⅰ動詞1 (靠近;接觸) come into contact with; come close to 2 (連接; 使連接) connect; join; put ...
  • : Ⅰ動詞1 (把攤開的或分散的事物聚集、合攏) put away; take in 2 (收取) collect 3 (收割) harvest...
  • 空中 : in the sky; in the air; aerial; overhead; midair
  • 接收 : 1 (收受) receive; reception; accept; [電學] receipt; receiving 2 (接管) take over; expropriat...
  1. Lc apparatus almost meet all the needs of space optical communication such as weight, size, power consume, life, cost, driving voltage, intergration of optics and electricity, programe, optically take ? over aperture, beam scanning, deflexional range and so on. switches, deflexional facilities and scanning equipments which made with lc have been used in the system of labor in space communication. the only bug of lc apparatus is that their answer speed only get microsecond rate or submicrosecond rate. but it is practical for them to be used in special beam capture, scan, deflexion controling which don ’ t concerned with code rate and code type

    液晶器件幾乎滿足間光通信的所有大的指標要求如重量、尺寸、功耗、壽命、成本、驅動電壓、光電集成、可編程性、光學孔徑、光束掃描和偏轉范圍等等。液晶光開關、光偏轉器、光掃描器已經開始應用於光纖通信的實驗系統。液晶類器件應用於光通信的唯一重大缺陷,是其響應速度目前只能達到微秒級或亞微秒級,不過,在不涉及到碼型碼率的間光束捕獲、掃描、偏轉、控制方面,液晶器件完全可能進入實用化。
  2. The main research advances can be summarized as follows : ( 1 ) study the signal processing ' s performances and methods of homing torpedo system comprehensively, in order to setting up a corresponding mathematical models ; ( 2 ) analyze the ocean channel ' s effects on the work of homing system, then found some models such as target echo signal, noise ( including background noise, target radiating noise, etc ), ocean reverberation. according to them, simulate the array signal ; ( 3 ) the system structure, every function blocks composing are studied and founded thoroughly. then, discuss methods of signal processing in time domain and airspace domain ; ( 4 ) program the simulation software of torpedo ' s homing system according to the simulation models and flow charts, which connected with torpedo ' s control part

    本文所作的主要工作及研究成果主要有以下幾個方面: ( 1 )對自導工作過程的信號與信息處理的基本理論與方法進行了較為全面的研究,為建立一個較為完備的自導模擬系統提供了理論基礎; ( 2 )討論了自導系統工作過程海洋通道對目標回波信號與目標輻射噪聲信號等的影響,建立回波信號的數學模型、環境場的噪聲信號模型(包括海洋環境噪聲、目標輻射噪聲與魚雷背景噪聲等)與海洋混響模型,模擬產生了聲自導系統基陣到的回波信號與噪聲信號; ( 3 )深入研究並建立了自導模擬系統的總體框架,給出各個具體功能模塊組成,討論了聲自導系統對信號的時域與域處理,並結合模擬程序陣列信號處理模塊,給出固定多通道波束形成的模擬實現過程; ( 4 )根據系統的模擬模型與已建立的模擬流程圖編制了通用魚雷模擬器自導系統模擬軟體,通過網路與控制系統相連,組成完整的魚雷模擬器。
  3. Input selector switch. a switch used by cable customers to alternate between cable and over - the - air television reception through a cable box

    輸入選擇器開關。通過一個電纜盒,電纜用戶使用這種開關在電纜和電視之間進行選擇。
  4. Based on mono - pulse radar system and the analysis of terrain echoes, a geometrical model of air to ground ranging is constituted. by using the signals received from the sum and difference channels of terrain follow radar, a group of the expressions for terrain echoes are educed and characteristics of these echoes are obtained. according to the characteristics of the echoes, the theory and method of pass zero detection of difference channel and its applications are discussed in detail

    針對一維單脈沖雷達體制,分析了地形目標回波特性;建立了地形跟隨雷達地測距的幾何關系;利用雷達發信號,導出了地形跟隨雷達和差通道的回波信號表達式,進行了波形模擬,得到了地形跟隨雷達的地面散射產生回波在時域的特性;根據和差回波特性,闡述了差信號過零點檢測測距的原理和方法及工程實踐的應用,並給出了真實雷達對外輻射試驗的結果,驗證了文的模擬。
  5. Through analysising the characteristics of the power system with floating neutral point deeply, the paper puts forward a new plan of single - phase to ground fault line selection on the base of s ' s signal injecton method and gives the hardware and software design. in this design, the high speed sampling and data processing is carried out through using dsp processor ; the large electrice current is drived through the application of a high - performance audio power amplifier and transformer ; the communication between host computer and detectors is realized through rs485 bus technology ; the difference multilevel frequency - selected amplifier is designed and the feeble signal of space is sampled on the base of the theory of magnetic induction ; the interface between dsp and exterior chip and rs485 interface logical is designed through using fpga ; the using of lcd module and keyboard interfacing chip makes the interface between human and machine ; the programme of host computer and detectors is designed through using blocking design method

    在本設計,採用高速的dsp處理器,實現了對故障特徵信息的高速採集與處理;採用大功率的功放晶元與變壓器配合的方法,實現了大電流信號的驅動輸出;採用485總線技術,組建了裝置主機與多探測器之間的主從式通訊網路,實現了多干擾條件下裝置主機與多探測器的可靠通訊;設計了差分式多級選頻放大電路,採用磁感應的方法實現了對間微弱信號的;利用fpga技術,實現了控制器與多外設的介面及數字信號的串並轉換;採用了先進的lcd液晶顯示模塊及鍵盤介面晶元,設計了人機信息交互的介面;採用了模塊化的軟體設計方法,開發了裝置主機及探測器的軟體程序。
  6. If characters such as blanks and punctuation are passed in an http stream, they might be misinterpreted at the receiving end

    如果在http流傳遞白和標點之類的字元,則它們在端可能會被錯誤地解釋。
  7. It is especially attractive for the downlinks and suppressing intercell mai. when multiuser detector is adapted in blind mode, it usually adopts eignvalue decomposition or singularvalue decomposition of received sample correlation matrix and tracking alrithgms, which result in high computational complexity. at the same time, approximation computation in tracking alrithgms also result in slow convergence

    為實現盲自適應檢測,通常採用對信號樣本矩陣進行特徵值分解( evd )或奇異值分解( svd )后進行跟蹤,由此帶來的子間秩跟蹤使得實現復雜度很高;另一方面,在跟蹤演算法考慮一些實際情況而作出近似處理,從而引起誤差積累和正交性誤差,導致每次跟蹤開始階段跟蹤速度變慢。
  8. The signal power perturbation on receivers caused by air target as well as the receiver ' s position information are used to extract the exact location of the target

    廣播、電視信號被的飛行器擾動以後,在端形成功率的波動。
  9. Both the radiosonde and the ground station are equipped with antennae for reception of gps signals from at least 4 satellites ( figure 1 )

    在探測過程,無線電探儀和地面站均裝有gps天線,可最少4個衛星發出的信號。
  10. But the gps receivers on the air china 757 fix the position of the aircraft to within a few metres as it begins its descent through a long valley, around an awkward ridge and down onto the new runway at linzhi

    但是當國國際航公司的波音757客機降低飛行高度通過一條危險山脊附近的長長山谷的時候,機上的gps器以米的精度鎖定飛機的航向,安全降落在林芝機場的新建跑道上。
  11. There are three kinds of drying systems : hot air drying, dehumidifying drying, and natural drying ; however, hot air drying is the most popular drying system

    本研究的目的為探討熱能回技術的效能,在熱風乾燥系統設計和研製排放濕熱氣和進入觸的熱能回裝置,達到加熱進氣溫度,減少乾燥作業所需能源。
  12. Therefore, the administration continues to maintain a system of dual - use controls, including on china, that focuses on evaluating the appropriateness of the proposed export to the civil needs of the end - user and the risk of diversion. the commerce department under the ear maintains dual - use controls that include china in the following areas of proliferation and military concern ; national security ( ns ), nuclear nonproliferation ( np ), missile technology ( mt ), and chemical and biological weapons ( cb )

    美國商務部根據《出口管理條例》 ( ear )在以下涉及擴散和軍事問題的領域對兩用品實施管制,其包括對國;國家安全( ns ) 、核不擴散( np ) 、導彈技術( mt )和化學及生物武器( cb ) 。涉及國家安全的管制特別提出廣泛審議的政策,如向國的某項出口對電子和反潛艇戰爭、情報集、力量推進或優勢有「直或重大」作用,將拒絕核準。
  13. The remote measurement system of the torque was designed, used wireless transmitter and receiver devices to transmit the signals, avoiding the errors which brought by slip ring, and solving the problems that are the space narrowness or connecting difficulty for the moving objects

    設計了扭矩遙測系統,使用無線發射裝置進行扭矩信號的傳輸,避免由集流環傳輸數據時帶來的誤差,而且解決了間狹小或是被測物體處于運動之而導致引線困難等問題。
  14. This dissertation is focused on the study of adaptive digital beam forming ( dbf ), two - dim spectrum estimation and the determination of the highness of the object. main work include : 1 a method of adaptive dbf in received antenna array

    本文圍繞著自適應波束形成、時-二維譜估計和對目標高度判定等方面進行研究,主要研究工作包括以下幾個方面: 1討論了在陣列天線,自適應數字波束形成( dbf )的方法,引入了采樣梯度矩陣演算法。
  15. On the contrary, the infrared passive sensors detect and locate the targets in the space by the use of the heat of the targets, and they do n ' t radiate any energy to the space

    和雷達不同,紅外無源探測器通過目標輻射的熱能進行定位和跟蹤,不向輻射任何能量,因而不易被偵察或定位,具有很強的抗干擾能力。
  16. Space - time processing for cdma with antenna array is investigated in this paper, which includes space - time channel estimation, beamforming technique, 2d - rake receiver, multiuser detection, space - time multiuser detection and joint estimation

    本文研究了天線陣cdma系統時處理技術,主要包括時通道估計、波束形成技術、時2d - rake機、多用戶檢測、時多用戶檢測和聯合估計。
  17. 2 both least mean - square ( lms ) and least - square ( ls ) blind space - time receivers methods based on the rosen ' s gradient projection are presented for space - time receiver that merge with the idea of smart antenna, and combined with the different data - selected schemes. the effect of these schemes on the computational complexity of two detection methods is analyzed. the simulations illustrate that those methods are effective

    2 、針對將智能天線的思想融入其機,提出了基於rosen梯度投影實現的最小均方( lms )與最小二乘盲機演算法並將提出的不同數據方案結合起來,分析了提出的方案對每次迭代運算的運算量的影響,通過模擬實驗驗證了方法的有效性。
  18. 3 a novel recursive least - square ( rls ) blind space - time receiver algorithm based on the constrained condition, which can completely avoid the matrix inversion introduced into by constraints ( comparing with the normal rls ), is proposed for multi - path slow fading cdma channels. the computational complexity of this method is not only lower than that of the normal rls, but also lower than that of both lms and ls blind space - time receiver methods that are realized based on the rosen ' s gradient projection. and the speed of convergence of the presented rls blind space - time receiver algorithm is better than that of both lms and ls blind space - time receiver methods

    3 、針對多徑慢衰落通道下ds - cdma盲線性約束二次規劃問題提出一種新的遞歸最小二乘演算法,該演算法完全避免因約束而引進的矩陣求逆運算(相對于常規的遞歸最小二乘演算法) ,不但運算量比常規的要低,而且比基於rosen梯度投影實現的最小均方( lms )與最小二乘盲機演算法還低,且斂速度比基於rosen梯度投影實現的最小均方( lms )與最小二乘盲時多用戶檢測都好,將提出的新的遞歸最小二乘演算法與提出的數據選擇方案結合起來可以進一步降低其運算量,具有很大的實用價值,最後通過模擬實驗進一步分析了其性能。
  19. Receiver function is simulated for inhomogeneous media, as a special case for elastic wave modeling with nearly vertical incidence plane p wave as initial condition, and provide the base for inversion and migration of receiver function in inhomogeneous media

    以下覆半無限間近垂直入射平面p波,作為彈性波數值模擬的特例,來模擬函數,從而為橫向非均勻介質函數的反演和偏移成像問題奠定了研究基礎。
  20. Several topics on coding and modulation theories of uav communication were discussed in this thesis. by analyzing features of uav communication, difference on three aspect between uav and satellite / civil mobile communication were pointed out, i. e. rapidity of the channel state parameters changing when low - altitude flying, wide range of the signal to noise ratio ( snr ) in receiver, and demand on transmission delay

    無人機通信與衛星通信、移動通信有相似之處,也有明顯不同,主要是:無人機低飛行時通道參數變化劇烈,通信機信噪比變化范圍大,要求傳輸時延短。
分享友人